I experience a problem while trying to create a Machine in WebLogic12c.
I downloaded Jdeveloper 12 for Windows 64-bit and initially everything was OK. I created a cluster and added a server to it, but was not able to start a server. I identified the issue was related to the NodeManager. After trying to bring it up using several options my WebLogic server stopped working - I couldn't start it from Jdeveloper IDE. At this point I unistalled JDeveloper, cleaned all the profile information from users/../Roaming/... directory and installed a fresh version of JDeveloper. Now I am able to start an Integrated WebLogic Server and access an Admin Pages, however I am not able to create a Machine. I am getting the following exceptions in my logs :